Implement basic metadata and image providers for episodes

Jellyfin.Plugin.TubeArchivistMetadata/TubeArchivist/ResponseContainer.cs

@@ -0,0 +1,14 @@
+namespace Jellyfin.Plugin.TubeArchivistMetadata.TubeArchivist
+{
+    /// <summary>
+    /// Class representing the base common structure of TubeArchivist API responses.
+    /// </summary>
+    /// <typeparam name="T">The contained data type.</typeparam>
+    public class ResponseContainer<T>
+    {
+        /// <summary>
+        /// Gets or sets the contained data object.
+        /// </summary>
+        public T? Data { get; set; }
+    }
+}